:root {
    /* Colors - Light Mode (Default) */
    --primary-color: #6366f1;
    /* Example Indigo 500 */
    --primary-hover: #4f46e5;
    --bg-color: #f8fafc;
    --sidebar-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --danger-color: #ef4444;
    --success-color: #22c55e;

    /* Spacing & Sizes */
    --sidebar-width: 260px;
    --header-height: 70px;
    --border-radius: 12px;
    --font-family: 'Instrument Sans', sans-serif;
}

/* Dark Mode Variables */
body.dark-mode,
html.dark-mode {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --card-bg: #1e293b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    height: 100vh;
    overflow: hidden;
    /* App-like feel */
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    z-index: 100;
    position: relative;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-left: 10px;
    flex-shrink: 0;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    overflow-y: auto;
    max-height: calc(100vh - 150px);
}

/* Custom scrollbar for sidebar */
.sidebar-nav::-webkit-scrollbar {
    width: 6px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background-color: rgba(0, 0, 0, 0.3);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    font-family: inherit;
    font-size: 1rem;
}

.nav-item:hover {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: rgba(99, 102, 241, 0.1);
    /* Primary with opacity */
    color: var(--primary-color);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

/* Sidebar Footer */
.sidebar-footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 101;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    position: relative;
    z-index: 102;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background-color: #ddd;
    /* Fallback */
}

.user-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.user-role {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.logout-btn {
    color: var(--text-secondary);
    transition: color 0.2s;
}

.logout-btn:hover {
    color: var(--danger-color);
}

/* Specific hover color for user icon - override danger color with green */
.logout-btn[href="?page=profile"]:hover,
.logout-btn[href="?page=profile"]:hover i {
    color: var(--success-color);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
    background-color: var(--bg-color);
    position: relative;
    z-index: 1;
}

/* Common Components */
.page-header {
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.header-content {
    flex: 1;
    margin: 0;
    padding: 0;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    /* Bolder as per image */
    color: var(--text-primary);
    margin: 0 0 4px 0;
}

.page-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin: 0;
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.om-table {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
}

.om-table th,
.om-table td {
    /* columns auto-size evenly with table-layout: fixed; */
}

/* Form Elements */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group.full-width {
    grid-column: span 2;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input,
select,
textarea {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-family: inherit;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    align-self: flex-start;
    margin-top: 0;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-color);
}

/* Utility */
.text-right {
    text-align: right;
}

.mt-4 {
    margin-top: 1.5rem;
}

/* Input with icon button */
#add_transport_btn:hover {
    background-color: rgba(99, 102, 241, 0.1) !important;
}

/* Password confirmation modal */
.password-modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(15, 23, 42, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.password-modal-overlay.active {
    display: flex;
}

.password-modal-dialog {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

.password-modal-title {
    margin: 0 0 8px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.password-modal-text {
    margin: 0 0 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.password-modal-input {
    width: 100%;
    padding: 10px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.95rem;
}

.password-modal-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

.password-modal-actions {
    margin-top: 20px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.password-modal-danger {
    background-color: var(--danger-color);
}

.password-modal-danger:hover {
    background-color: #b91c1c;
}

/* Status badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-badge i {
    font-size: 0.75rem;
}

.status-badge-pending {
    background-color: rgba(249, 115, 22, 0.08);
    color: #ea580c;
}

.status-badge-success {
    background-color: rgba(34, 197, 94, 0.1);
    color: var(--success-color);
}

/* Menu Toggle Button */
.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 999;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 10px 15px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.menu-toggle:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
    transition: all 0.2s ease;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
    }
    
    .sidebar.active {
        left: 0;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    }
    
    .sidebar-nav {
        max-height: calc(100vh - 120px);
    }
    
    .main-content {
        padding: 20px;
        width: 100%;
        margin-left: 0;
    }
}
    .menu-toggle {
        display: block !important;
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 999;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 5px;
        padding: 10px 15px;
        cursor: pointer;
    }
}

@media (min-width: 769px) {
    .menu-toggle {
        display: none !important;
    }
    
    .sidebar {
        position: static;
        left: 0;
        height: 100vh;
    }
    
    .sidebar-nav {
        max-height: calc(100vh - 150px);
    }
}